Subaru OEM 2nd Gear Driven Subaru STI 2007 | 32251AA890

Overview

The Genuine Subaru OEM 2nd Gear Driven (Part #32251AA890) is an exact-fit factory replacement gear designed specifically for the 2007 Subaru STI 6-speed transmission. Built to OEM specifications, this driven gear ensures precise mesh, optimal power transfer, and long-term durability — critical for the high-performance demands of the EJ257-powered STI platform. Whether you're rebuilding a worn transmission or replacing a damaged gear, this is the correct factory part for a reliable, like-new result.

Key Features & Benefits

• Genuine Subaru OEM Quality — Manufactured to factory tolerances, ensuring exact fitment and performance identical to the original component.
• Exact-Fit Guarantee — Engineered specifically for the 2007 STI 6-speed transmission; no modification or adaptation required.
• Precision Gear Geometry — Factory tooth profile and hardening process maintain proper gear mesh, reducing wear and noise under high-torque conditions.
• Factory Warranty Coverage — As a Genuine Subaru part, eligible for Subaru's OEM parts warranty when installed through an authorized dealer.
• Direct OEM Replacement — Replaces worn, chipped, or damaged 2nd gear driven components in the TY856WB4CA and related STI 6-speed transmission assemblies.

What's Included

• 1x Genuine Subaru 2nd Gear Driven — Part #32251AA890

Specifications

Installation

Installation of this 2nd gear driven component requires full disassembly of the STI 6-speed manual transmission. This is an internal transmission part — professional installation by a qualified Subaru technician or experienced transmission builder is strongly recommended. Proper torque specs, bearing preloads, and gear clearances must be verified during reassembly to ensure transmission integrity and longevity.